base (mathematics)

The number on which a system of counting is constructed (number-base). The numbers in common use are in base ten, which uses ten symbols 0–9, and expresses numbers in multiples of powers of ten; thus ‘three hundred and forty-two’ is written 342, since it is 3 × 10² + 4 × 10 + 2. A number in base five, which uses five symbols 0–4, would be written as the sum of multiples of powers of five; thus ‘seventy-three’ (in base ten) is 2 × 25 + 4 × 5 + 3 = 2 × 5² + 4 × 5 + 3 = 243_five: other than base ten, base two is the commonest base.

Base may refer to:

In computing:

Google Base, an online database provided by Google OpenOffice.org Base, OpenOffice.org's database module

In mathematics:

Base (mathematics), or radix, the number of digits in a positional numeral system, e.g. see also Cost basis Islamic Extremist group Al-Qaeda is literally translated 'The Base.'

In sport:

Base (baseball), the 3 canvas bags and home plate BASE jumping

In architecture:

The bottom of a building or other structure A part of some types of column, below the shaft A pedestal, supporting a statue or other item

In Science:

Base (chemistry), a substance with a pH greater than 7.

Other uses:

A base can be a defined area that contains shelter, equipment, and resources: a area which supports human habitation in a hostile environment, such as a Moon base or a base in Antarctica a Military base, which provides shelter, military equipment and personnel base station, a medium to high-power multi-channel two-way radio which is in a fixed location BASE (mobile), a Belgium mobile telecommunications operator In a transistor, the base is the controlling connection to the junction.